If you're actually building a race car then contact AST about AST and Moton products and Penske directly and get a recommendation from them on an authorized reseller to work with on the project. Racing shocks are expensive and high maintenance, and you'll need proper support from factory trained technicians to set them up in the first place keep them working properly.

If you're interested in looking further than those two brands, then check out Bilstein's new line of racing shocks and struts.

Penske makes top notch shocks too, but they are not too common on the E9X.

As JAJ have said, make sure that you work with a distributor who has experience and knows how to set up your car. Having race shocks with a terrible set up is like having a hot girlfriend and never go to bed with her.

One last thought. Which class in NASA are you running? This is an important consideration as well because different rule books treat single shocks, shocks with remote reservoirs, and shocks with fixed remote reservoirs differently. I run in NASA TTA now and that's why I switched to KW Competition because it does not have remote reservoirs and hence less point penalty.

Penske makes top notch shocks too, but they are not too common on the E9X.

As JAJ have said, make sure that you work with a distributor who has experience and knows how to set up your car. Having race shocks with a terrible set up is like having a hot girlfriend and never go to bed with her.

One last thought. Which class in NASA are you running? This is an important consideration as well because different rule books treat single shocks, shocks with remote reservoirs, and shocks with fixed remote reservoirs differently. I run in NASA TTA now and that's why I switched to KW Competition because it does not have remote reservoirs and hence less point penalty.

Cheers.

I am planing on running TT. Per my calculations, my M3 will be in TTS. I am doing brakes and suspension plus all of the safety mods (Cage, Fire suppression...). I feel that these two performance mods are what this car really needs. No engine mods are planned, as the V8 has enough power for me. I am interested in having a safe, fun car to better my driving skills. At this point, winning is not my number one priority. I just hope it does not bump up into TTU.

I am planing on running TT. Per my calculations, my M3 will be in TTS. I am doing brakes and suspension plus all of the safety mods (Cage, Fire suppression...). I feel that these two performance mods are what this car really needs. No engine mods are planned, as the V8 has enough power for me. I am interested in having a safe, fun car to better my driving skills. At this point, winning is not my number one priority. I just hope it does not bump up into TTU.

1) Shocks with external reservoir or more than two ranges of adjustment. +10 points
2) Shocks with piggyback external reservoir. +7 points
3) Shocks that do not have external reservoirs. +3 points

So, the question you have to ask is: performance wise, is having an external reservoir shock worth +7 points on top of a non-reservoir 2-way shock? As a reference, there is a +8 point difference between AD08 and Hoosier R6.

I am planing on running TT. Per my calculations, my M3 will be in TTS. I am doing brakes and suspension plus all of the safety mods (Cage, Fire suppression...). I feel that these two performance mods are what this car really needs. No engine mods are planned, as the V8 has enough power for me. I am interested in having a safe, fun car to better my driving skills. At this point, winning is not my number one priority. I just hope it does not bump up into TTU.

If winning is not your goal, I would make sure to ask yourself what you will be doing with your car in the future? Maybe once you start doing time trials you will get more competitive and want to win. I would say TTA is more of a suitable class for the E92 M3. At least in the Great lakes region you would need to run about the times of a Grand Am E92 M3 in TTS to be a front runner. Will you eventually make the change to wheel to wheel? Something like GTS-4/5?

Its better to buy something once then twice. So if wheel to wheel racing is in your future and you are not serious about being competitive in time trials, I would say go for the triple adjustable set up or better. Penske can make a set up for your car and is top of the line but Moton, Motion control, Jrz will already have kits made for your car.